Record driving mechanism for pneumatic actions



June 5, 1945. G. w. CARLSON RECQRD DRIVING MECHANISM FOR PNEUMATiCACTIONS '7 Shets-Sheet 1 Filed April 25, 1940 l 0 Q0 C) Q 0 a I INVENTORGeorge W CarZson June 5, 1945. G. w. CARLSON RECORD DRIVING MECHANISMFOR PNEUMATIC ACTIONS Filed April 25, 1940 7 SheetsSheet 2 INVENTOR ye WCarlson Gem 6, Z;

June 5, 1945. G. w. CARLSON RECORD DRIVING MECHANISM FOR PNEUMATICACTIONS Filed April 25, 1940 '7 Sheets-Sheet 3 GN mb W I- I .1 1 v u u aa n n x w I!!! h kw l: {:1 ||||.v|-- .f n n I m VN 9 v a? //m J mm M w w1 m mvmv w HnHhHHH-PJH IHHH Hun: ll Till L D Wm Nm. m H I MN Q MET w an1 MN w L m mw Q v 1! Q3 n F NM NN N mm M M NH INVENTOR June 5, 1945. w,CARLSQN 2,377,323

RECORD DRIVING MECHANISM FOR PNEUMATIC ACTIONS Filed pril 25, 1940 7Sheets-Sheet 4 i W H f1? b In I I O U) l Q Q 0 q a" a Q N IQ'[\"7.:=\\:I N

s In 1) to N 0 1) 0 Q N I 5 1 g 63 "I l il {Q N g l 2 w L g INVENTOR Geor ge W Carlson June 5, 1945. G. w. CARLSON RECORD DRIVING MECHANISM FORPNEUMATIC ACTIONS Filed April 25, 1940 Sheets-Sheet 5 ll-J L V 17- b///4 To STOP Cmcu/T 5 A & P l INVENTOR 4 George W. Carlson a! 4-,

i 7 z r: :3 C roar/m1 m, k\ 12 Cmcun' June 5, 1945. w, CARLSQN 2,377,323

RECORD DRIVING MECHANISM FOR PNEUMATIC ACTIONS Filed APril 25, 1940 7Sheets-Sheetfi '73 mmm mum *wwm I I Q 5 91 102" Q Q w i 10 Q; A I

gar- INVENTOR George W Carlson I m M Jane 5, 1945.

G. W. CARLSON RECORD DRIVING MECHANISM FOR PNEUMATIC ACTIONS Filed April25, 1940 7 Sheets-Sheet 7 INVENTGEE' George W. Carlson r uma 95km t S RH Patented June 5, 1945 RECORD! DRIVING MECHANISM FOR PNEUMATIC ACTIONSGeorge W. Carlson, Pittsburgh, Pa", assignor to Robert H. Mcclintic,Pittsburgh, Pa.

Application April 25, 1940, Serial No. 331,564

14 Claims. (Cl. 24z 55) types of mechanisms, it will be particularlydescribed in connection with the pneumatic typewriter action, but itwill be understood that this is by way of illustration and not by way oflimitation. Where a typewriter is operated pneumatically for theindividual typing of standardized letters, it is often desirable,particularly where the letters are relatively short, to have severaldifferent letter records out on a single record roll. This avoids thenecessity for the changing of the record roll every time a difierentletter is to be written. Where such a multiple record is provided on asingle roll, it is necessary to provide some selector action whereby apredetermined letter on the record may be selected out and written. Itis further desirable that the selected record be repeated until someother selection is made.

For example, in the collection of accounts, different standardizedletters are written to different customers depending upon the conditionof their account. The operator of the pneumatic typewriter usuallyoperates the machine with a file of account cards which is followedthrough in alphabetical order. Some of these accounts may require aletter written at the front of the record roll, others may require aletter that is out near the end of the record roll, while still othersmay require letters cut at an intermediate point in the full length ofthe record. According to the present invention there is provided arecord driving mechanism including a selector whereby the operator mayinitially select the first letter to be written and this letter will berepeated until the operator changes the selection. The invention furtherprovides a selector mechanism where a selection may be made for asucceeding letter while the machine is writing one letter so that afterfinishing the letter-which is being written, the record willautomatically turn to the next succeeding portion of the record to beutilized.

The record, when it is playing or writing, is driven at a fairly slowspeed forward, winding from the record roll onto a take-up spool. Wherea selector is used it is desirable that there be, in addition to theslow forward speed, a skip forward drive at which the record will bedriven at a relatively high speed forward without writing or playinguntil it reache the selected portion of the record when the skip forwardspeed is rendered inoperative and the conventional forward drive becomesoperative. The present invention provides for such a forward operationof the record roll. In conventional pneumatic ac- ;ions, the rewind isalways at a relatively higher speed than the forward playing of therecord. The present invention provides a selector'wherein the rewind,instead of rewinding to the beginning of the record roll, as in manytypes of selector actions, rewinds only to the beginnin of that portionof the record which is to be utilized in the next operation of themachine.

The present invention provides a selector action which is unique,positive and more easily and conveniently operated than selectormechanisms heretofore used for the same purpose and which is lesscomplicated and expensive than previous mechanisms. The inventionfurther provides a record driving mechanism of a new construction,together with pneumatic circuits of an improved character. The inventionfurther provides a selector action which can be coupled into aconventional pneumatic circuit for mechanisms of this kind with verylittle change in the organization and assembly of such circuits.

My invention may be more fully understood by reference to theaccompanying drawings in which Figure l is a plan view of a pneumaticmechanism embodying my invention which mechanism is adapted for theoperation of a typewriter, the typewriter however not being shown;

Figure 2 is a side elevation of the mechanism shown in Figure 1;

Figure 3 is a top plan view on a somewhat larger scale of the recordspool mechanism and its drive;

Figure 4 is an end view of the double pneumatic for controlling therewind and skip forward drive;

Figures 5, 6, 7 and 8 are details of a cut-off valve in the pneumaticbrake-controlling line;

Figure 9 is a vertical section through the selector mechanism, theselector valve being shown in elevation;

Figure 10 is a section similar to Figure 9 but at right angles thereto:

Figure 11 is a horizontal section in the plane of line XI-lfl of Figure9, the view showing an elevation of the record-driven selector-shiftingmechanism;

Figure 12 is a view partly in plan elevation and partly in sectionshowing the selector valve-operating pneumatic and showing one of theselector valves in section;

Figure 13 is a perspective view showing the mechanism for transmittingmotion to the selector valve-operating mechanism;

Figure 14 is a side elevation of a part of the selector mechanismshowing the position of the parts for a skip forward operation;

Figure 15 is a view similar to Figure 14 showing the position of theparts in effecting a rewinding operation;

Figure 16 is a diagram of the pneumatic circult;

Figure 17 is a section through a conventional pneumatic on-and-oflvalve;

Figure 18 is a detail view of the double pneumatic as shown in Figure 4and certain associated parts, including what is termed the drivepneumatic release valve; and

Figure 19 is a detail view in perspective of the drive pneumatic releasevalve shown in Figure 18.

General construction The particular pneumatic mechanism illustrated isof the general construction disclosed in my copending application,Serial No. 313,415, flied January 11, 1940, now Patent No. 2,327,172,dated August 17, 1943. The mechanism comprises abase frame 2 having arecord spool mechanism and drive at the back thereof. Forwardly of thespool mechanism and set into an opening in the platform 2 is akey-selecting unit designated generally as 3 having a plurality of tubes4 leading to openings in a tracker bar. The key-selector mechanismselectively operates pull rods 5 which in turn serve to pull down akey-operating hook 6 more fully explained in the said copendingapplication. The arrangement is such that when a given character openingin the tracker bar is uncovered by the record, an impulse of air isadmitted to an appropriate unit of the key selector, operatink one ofthe pull rods 5 and key-engaging hooks 6 to depress the correspondingkey of the typewriter or other multiple key device. The typewriter,which is not shown, sets on the base 2 and covers the selector 3, thewires 5 and the keyboard extending over the hooks 6 so that these hooksmay engage the key bars.

On the base 2 is a support I having a number of control buttons of whichI, 9 and I0 may be referred to in connection with the presentapplication Button num ber Ill is the "start button. Depressing of thisbutton admits air to a pneumatic circuit which initiates the forwarddriving of the record. Button number 8 is the stop" button. When it isoperated, atmospheric air is admitted to a pneumatic circuit to stop therecorddriving mechanism. Button number I when depressed admits air to apneumatic circuit to manually effect a rewinding of the record.

The record spool mechanism Mounted on the base of the machine 2 near theback thereof is an electric motor l2 which drives a pneumatic or vacuumpump located on the base of the machine in the general vicinity of thereference character II in Figure 3, but this vacuum pump forms no partof the present invention and is not illustrated in detail. The motoralso drives through a reducing gear a sprocket wheel H and ,it alsodrives through a reducasmsss ing gear at a somewhat higher speed, alarger sprocket wheel II.

The record spool mechanism comprises two side plates II and I! which aresupported on standards above the base 2. A tracker bar II has itsopposite ends set in the two plates. This tracker bar has a number ofopenings as will be readily understood by those familiar with pneumaticactions, and all of the openings have not been shown. Carried on theplate I. to the rear of the tracker bar and somewhat below the trackerbar is a record-holding disk I! having a cone 20 at the center thereofadapted to project into the hollow interior of a record roll. This diskis freely rotatable. Carried on the plate H in alinement with the diskIt is a second cooperating disk 2| for engaging the other end of arecord roll, the disk 2| having a projection 22 to enter the center .ofa record roll. The disk 2| is carried on a thereof. The shaft 21 for thetake-up spool is provided with a drum 2! at its left-hand end. Theright-hand end of the shaft 21 rojects through the plate I! and has aspur gear 29 (best shown in Figure 2) at its outer end.

The plate II ha two horizontally projecting brackets 22 and II thereonwhich provide a bearing for a shaft 22. Secured to the shaft 32 is asprocket u. A chain 34 passing around the sprocket II and around thesprocket 22 serves to transmit power from the motor to the shaft 22.Splined to the end of the shaft I2 so that it may be shiftedlongitudinally on the shaft but remain keyed to the shaft is a frictiondisk 2| having a grooved hub portion 26 thereon. The periphery of thefriction disk 28 projects through a window or opening 21 in the plate IIand extends between the periphery of the disk I! of the record holderand the periphery of the flange 25 of the record spool. When thefriction disk I! is thrust forwardly as viewed in Figure 3, it contactsthe periphery of the flange 2| on the take-up spool to drive the take-upspool, and when it is thrust rearwardly as viewed in Figure 3, itfrictionally engages the periphery of the disk II to rewind the record.

For moving the friction disk II back and forth to engage the peripheryof one or the other of the two members, there is provided a yoke 22which engages in the groove of the hub ll of the friction wheel, saidyoke being at the end of an arm I! on a rock shaft 4| which rock shaftpasses through the plate I8 and has its opposite end passing through thesupporting plate II and which is located forwardly of and below the axisof the record roll.

The friction disk '25, when it is driving the take-up spool, drives thespool at a relatively high speed to effect what has been herein referredtoss the skip forward" operation of the record. In the skip forward oftherecord the record moves at relatively high speed forwardly over thetracker bar but the key selector mechanism is rendered unresponsive tothis movement of the record. This friction disk 8| also rewinds therecord at a relatively fast speed and of course in the rewindingoperation the key selecting action does not respond to the movement ofthe record.

For operating the rock shaft 46 to shift the cross bar 44 connects themovable plates of the pneumatic 4| and 46 so that both pneumaticsoperate in unison and when one expands, the

other collapses. A lever 45 clamped to the rock shaft 46 extends downfrom the rock shaft and has its lower end pivotally secured to theconnecting bar 44 so that when the connecting rod 44 shifts hack andforth, the lever 45 is rocked to rock the shaft 46 and thus shift thefriction disk 65. The lever 45 may assume a neutral position in whichneither of the pneumatics 4| or 46 is fully expanded or contracted andin this position the friction wheel 65 is out of contact with both ofthe elements 44 and 45 which it is designed to drive.

The plate It also carries two other horizontally extending brackets 46and 41 (see Figure 3), the forward bracket 41 being in a. plane abovethe bracket 46. A shaft 46 has a loose bearing in the bracket 46. Theother end of the shaft 46 i received in a bearing 49 mounted in a link50 pivotally hung from the bracket 41. Keyed to the shaft 48 is afriction wheel i and which also carries a sprocket 52. A chain 53transmits motion from the motor-driven sprocket i4 to the shaft 48 andfriction wheel 5|, The friction wheel 5i is of smaller diameter than thefriction wheel 35, and the sprocket i4 is driven at a lower speed thanthe sprocket I 5. The periphery of the friction wheel 5| projects intoan opening 54 in the side plate iii. The friction wheel 5i may be movedinto and out of engagement with the end face of the disk 25 of therecord spool 24. This is accomplished by swinging the link 50 toward andaway from the plate i6, the loose bearing of the shaft 48 in the bracket46 permitting this movement of the shaft and friction wheel. When thefriction wheel 5| is held against the end face of the take-up spool, itserves to drive the spool forwardly at a relatively slow speed which isthe proper speed for operating the typewriter or other multiple keydevice. When the friction wheel Si is moved out of engagement with theend of the take-up spool, it of course has no driving connection withthis spool.

For swinging the link 50 toward and away from the plate IE to bring thefriction wheel 5| into and out of driving engagement with the end of thetake-up spool, the link 50 has a pull rod 55 attached to its lower end.This pull rod passes through the plate l6 and across the front of thespool bodies a shown in Figures 1 and 3 and through the other side platel1. It is provided at its free endwith a, nut 56 that forms an abutmentagainst which a lever 51 engages. The 1ever 51 projects from the movableelement 56 of a pneumatic 59, the arrangement being such that when thebellows-like pneumatic 56 is collapsed, the lever 51 moves toward theleft as viewed in Figure 3 tending to pull the rod 55 to the left thusbringing the friction wheel 5| into engagement with the end of thetake-up spool. When the pneumatic 56 is open, a compression spring 66moves the rod 55 in the opposite direction.

The pneumatic 66, because it serves to operate the drive which drivesthe record forwardly at the normal speed, is termed the "drivepneumatic" as distinguished from the skip forward pneumatic 43 andrewind pneumatic 4i. The record-driving mechanism as described,therefore. comprises the record spool holder in the form of the disks l6and 2i, the take-up spool 24, the skip forward and rewind drive, and thenormal forward drive. The record designated X in Figure 1 is moved overthe tracker bar from the record holder to the take-up spool or in theopposite direction. In order that the drive pneumatic 56 will always bereleased when the skip forward or rewind pneumatics are energized, the

rock shaft 46 is provided with a second lever 6i (see Figure 18) similarin construction to the lever 45. The lower end of this arm is positionedbetween two spaced metal strips 62 and 63 at opposite sides of a valvebox 64. The valve box 64 is mounted ona second valve box 65 which housesa complicated valve system forming no part of the present invention andthrough which various functions of the typewriter are controlled fromthe. record and which corresponds generallimto the valve unit 0 of myprior Patent No. 2,180,793. When the rock shaft 46 is moved in eitherdirection out of a neutral position, the arm 6i presses one of the valvefingers or strips 62 or 63 as the case may be away from the valve box64. This serves to open a vacuum circuit to atmosphere in such mannerthat the drive pneumatic 59 cannot be collapsed by suction as long asair is thus admitted. This may be understood by reference to thepneumatic circuit diagram of Figure 16, and will be hereinafter morefully described. Th spring fingers 62 and 63 not only provide opposedvalves, but they exert a pressure, when flexed to move the arm 6|, andhence the friction wheel 35 to neutral position.

Record selector mechanism The record spool mechanism which has beendescribed has for its purpose to move the record roll backward orforward over the tracker bar, there being two forward speeds, one forplaying and one for skipping forward to some subsequent part of therecord. It is contemplated that a single record roll or record sheetshall have a plurality of separate records thereon, in the case of atypewriter each separate record being either a separate letter or aseparate paragraph. The purpose of the record selector is to enable theoperator to select that record on the record sheet which is to be nextused and to cause the record spool mechanism to operate to either windthe record forward at high speed or rewind it as may be necessary tolocate the record on the record sheet which is to be used and bring thestarting portion of such record into position over the tracker bar sothat upon operation of the drive pneumatic the selected record will moveforwardly at slow speed over the tracker bar.

It has been previously pointed out that the right-hand end of thetake-up record roll is provided with a spur gear 29. This spur gearmeshes with a spur gear of larger diameter 29' which is also mounted onthe side plate l6. Projecting outwardly from the hub of the spur gear29' is a shaft 66 having a bevel gear 61 adjacent the outer end thereof,there being a bracket 66 providing a bearing for the outer end of theshaft 66. The

bevel gear 91 meshes with pinion 99 on a forwardly extending inclinedshaft 19. The shaft II has its forward end supported in a bearingbracket H (see Figures 9 and 10), and the end of the shaft 19 isprovided with a worm gear 12 which meshes with teeth on the periphery ofa worm wheel 12. The train of gearing from the take-up spool to the wormwheel 19 is a reducing train so that for the longest record which thespool will accommodate the worm wheel 19 will preferably not be driventhrough a full circle although it may be driven almost through a fullcircle. The worm wheel 19 is provided on its underface with a pin I4 theterminal of which is wedge-shaped.

Immediately below the worm wheel I9 is a hollow sleeve-like member I9having a laterally projecting arm 19 through which extends a rock shaftTI. The rock shaft I1 is provided at its inner end with a lever arm I9which arm projects through a slot I9 in the sleeve 19. The outer end ofthe shaft H has a notched disk 99 attached thereto. The notched diskwhich is best shown in Figures 14 and 15 is provided with one deep notch99a and with three secondary notches 99m, 891/ and 89a in its periphery.The notch 99a is provided for cooperation with the wedge-shaped pin I4on the worm wheel I3 as will hereinafter be more fully described. Aresilient arm 99d has a terminal portion which engages in the notches892:, 99y and 89a, depending upon the position of the disk 89, andforming a detent to properly position every movement of the disk 89 andhold it from free movement.

Projecting upwardly from the sleeve 19 from the hub of the gear wheel I9is a shaft II, the shaft 9| being pinned or keyed to the sleeve I9, andat the upper end of the shaft 9| there is secured a knurled operatingknob 92. The arrangement is such that by turning the knob 92, the sleeveI9 may be rotated to change the location of the disk 99 with referenceto the pin 14 on the worm wheel I3. Below the knob 92 and supported onthe bracket 'II is a fixed indexing disk 93 which is illustrated ashaving a series of equally spaced holes 93a therethrough near theperiphery thereof. The indexing disk 99 is fixed with reference to theknob 92 and with reference to the worm wheel I9, but the worm wheel IIcan rotate about the shaft 9| without turning it.

Extending downwardly through the sleeve 15 is a rod 94 having an offsetarm 99 at the top thereof. This arm is provided with a pin 99 thereonthat passes through a slot in the lever 19 on the rock shaft 11, and thearrangement is such that when the rock shaft I1 is rocked through alimited arc in one direction or the other, correspondingly moving thearm 19, the rod 94 will be caused to slide up and down. The rod 94projects below the bracket II. On the lower portion of the rod 94 thereis a loose collar 91 having a pin 99 that projects therefrom. Thiscollar is confined between two fixed collars 99 one above and one belowit, the arrangement being such that the collar 91 with its pin 99 iscaused to move up and down as the rod 94 is caused to move up and down,but at the same time the rod 94 can r0- tate with reference to the pin99 when the whole assembly comprising the knob 92, th shaft 9|, thesleeve 19 and the rod 94 is turned.

The lower part of the rod 94 with the collar 91 and its pin 99 extend infront of a supporting plate 99 (see Figures 9 and 10). At the righthandend of this plate as viewed in Figure 9 there is a multiple valve unit,and at the left-hand end as'msss there is an operating pneumatic. Thevalve unit, the construction of which may best be understood byreference to Figure 12, comprises a block 9| having three push buttonspassing therethrou h andarrsngedinanarconthesurfaoethereof, theuppermost of these push buttons being designated 92, the intermediateone 99, and the lower one 94 (see Figure 9). Push button 92 controls therewind of the record; push button 99 controls the forward playing of therecord; and push bution 94 controls the skip forward drive of therecord. The structure for the valve controlled by the buttons 92, 99 and94 is the same in each case, and the one controlled by push button 99 isillustrated in detail in Figure 12. It comprises nothing more than aflexible strip 99 secured to the block 9| by a pin 99 and guided on asecond pin 91. It is urged toward the face of the block by a spring 99.The end of this strip is wrapped with leather which when the valve isclosed, covers the ports designated p 9', p" and p. These ports passthrough the block 9i and from them lead suitable tube nipples. In Figure12 the valve is shown in the normal closed Position but the depressingof the button 99 would uncover ports p -p to admit atmospheric air. Thepush buttons 92 and 94 operate similar valves, but in the case of thepush buttons 92 and 94, a fewer number of ports are controlled and also,in the case of the valves controlled by the push ins 92 and 94,connecting passages are formed in the block M by which crosscommunication is established. This is most clearly shown in the diagramin Figure 16 where the various interconnecting air channels are shown.This figure will be hereinafter more fully described.

Mounted on the block 9| is a pin 99 which passes through a pushbutton-operating finger I99 which is in the form of a strip of metalhaving a terminal portion I99 at its right-hand end as viewed in Figure12 for engaging the push buttons 92, 99 and 94 and having at itsopposite terminal an inwardly turned and or lug I99a. A spring "I on thepin 99 serves to yieldably urge the finger I99 outwardly, thearrangement being such that the finger may be rocked inv an are aboutthe pin 99 as a pivot and it can also be rocked about an axisperpendicular to the pin 99 in a see-saw fashion to depress the terminalI99 when the terminal I99a is pushed outwardly as viewed in Figure 12.The pin 99 on the collar 91 passes through the finger I99 so that the upand down movement of the rod 94 causes the finger to be swung in an areabout the pin 99 as a pivot. When the rod 94 is pushed down to itsfurthest limit, the terminal I99 of the finger is over the pin 92, asshown in Figure 9, and when the rod 94 is pulled up to its highestlimit, the terminal I99 a over the push button 94, and of course at theintermediate position of the rod 94 the finger is in position to operatethe intermediate push button 99.

For operating the finger I99 in a see-saw fashion to push the respectivepins 92, 99 and 94, there is provided on the supporting plate 99 apneumatic I92 having a widened extension I99 thereon over which thein-turned terminal I99a of the finger rides. The arrangement is suchthat when the pneumatic is in a normal expanded position, it beingexpanded by a s ring "431 finger I99 is in a normal position. When thepneumatic I92 is collapsed by connecting it to a suction pump, theextension I99 moves outwardly as viewed in Figure 12 ap plying pressureagainst the terminal I99a, thereby pushing the terminal I of the fingerinwardly so that the push button which is directly under the terminalwhen this action occurs will be depressed to open the correspondingvalve,

Operation of the pneumatic I02 is always controlled from the record rollitself through an opening in the tracker bar and an appropriatepneumatic circuit. The movement of the rod 84 up and down to determinethe position of the finger I00 on the other hand is determined byrelative motion between the member I5 which carries the extension I6with the notched disk 80 and the worm wheel 13 which has thenotch-engaging projection I4. By reference to Figure 14 it will be'seenthat if the disk 80 is in the position shown in that figure and the wormwheel is rotated in a clockwise direction, the projection 14 will moveinto the notch 80a in the disk 80, and as the worm wheel continues tomove, it will throw the disk 80 to the over-center position illustratedin Figure 15. This clockwise movement of the gear wheel I3 will thusserve to shift the valve-operating finger I00 from the position toengage the skip forward button 94 to a position to engage the rewindbutton 02. On the other hand, when th parts are in the position shown inFigure 15 and the worm wheel moves in a counterclockwise direction, theprojection I4 engaging in the notch of the disk 80 will return the partsto the position shown in Figure 14. It will be apparent also that if theknob 82 is turned manually to rotate the member I5 which carries thedisk 80 in one direction or the other, the disk 80 will move past thepin I4, and a corresponding shifting of the finger I00 will take place.Shifting of the finger I00 will, therefore, occur either by the manualturning of the knob 82 relative to the worm wheel I3 or by motion of theworm wheel I3 relative to the position to which the disk 80 is set bythe turning of the knob 82.

The worm wheel 13 of course is driven through the train of gearing fromthe record roll. The gearing is such that when the record roll isdriving forwardly, the worm wheel I3 initially turns in a clockwisedirection. When the record is rewinding, the worm wheel I3 will turnalways in a counterclockwise direction. When the parts are in theposition shown in Figure 14, only clockwise motion of the gear I3 ispossible because the valve finger I00 is over the skip forward valvebutton 94 and any operation of the pneumatic mechanism must thereforeinitiate the forward driving of the record roll. Likewise, when theparts are in the position shown in Figure 15, the va1ve-operating fingerI00 is over the rewind button and any operation which is initiated muststart to rewind the record and turn the gear I3 in a counterclockwisedirection. It therefore follows that when the disk 80 is in advance ofthe pin I4 as viewed in Figure 14 so that the worm wheel I3 must turn ina clockwise direction for the two to engage, the record will only bedriven forwardly when the next operation is initiated, and when the disk80 is behind the pin as shown in Figure 15, any succeeding operationwhich is initiated will be a rewinding operation. It will further beseen that the relation between the disk 80 and the pin is manuallyadjustable by turning the knob 82 to change the position of the disk 80with reference to the pin I4. If the knob 82 was turned so as to advancethe disk 80 with respect; to the pin I4, the succeeding movement of therecord must always be a skip forward operation until the projection I4has engaged the notch in the disk 80 and at least rotated the disk tothe intermediate position. On the other hand, if the knob 82 is manuallyoperated in a counterclockwise direction to set the disk 80 behind theprojection I4, the next operation to be initiated must always be arewind operation, and by reason of this fact a manual adjustment of theknob 82 enables any part of the record which is to be next used to beselected in advance. This will be hereinafter more fully explained.

Close to the surface of the indexing disk 83 is a pointer I05 that issecured at its center to a sleeve shaft I06 that surrounds the shaft 8I(see Figures 9 and 10) and which is driven directly by the worm wheel I3so that the operator of the machine may follow the forward or reversetravel of the record by following the position of the pointer around theindexing disk. The periphcry of the indexing disk is provided with anannular series of closely spaced holes 03a. One stop pin is set into oneof these holes 83a slightly in advance of the starting position of therecord and another stop pin is spaced an appropriate distance around theperiphery from the first one. Depending upon whether the record is along one or a short one, the two stop pins will be separated a greateror lesser number of degrees. The stop pin near the starting point is toprevent the record from ever being completely run off the take-up spoolafter the record has been placed in the machine as long as it is desiredto continue to use this one record. The other stop pin prevents therecord from ever being completely run off the original spool on theforward drive. These two stop pins, which have a friction fit in theholes 83a, are designated I01 and I08. Having inserted a record in themachine, the operator starts the machine forward. When one section ofthe record has moved forward corresponding to one of several letterswhich the record will reproduce, the operator observes the position ofthe pointer and inserts an indexing pin generally similar to the stoppins in that hole 8311 which is nearest the pointer. The operator thencontinues the record forward again, finds the end of the next letter orsection on the record, inserts another indexing pin, and continues toinsert an indexing pin at the end of each letter on the record and atthe beginning of the next. These indexing pins are designated I09a,I091), I090 and I00d in Figure 1. The number of indexing pins I09 willdepend upon the number of letters which the single record will reproduceand their spacing about the periphery of the indexing disk will dependupon the length of the respective letters. The indexing pins are ofslightly smaller diameter than the stop pins.

Slidable in the base of the knob 82 is a lock bar I|0 having a notchedouter end. As shown in Figure 9 it is provided with an upwardlyextending lug I I I and a. spring I I2 pressing against the lock servesto push the lock bar outwardly in a radial direction. The notchedterminal of the lock bar is adapted to engage the selected one of theindexing pins I09. For example, if the third letter on the record is theone next to be reproduced, the operator turns the knob 82 in a pin I88b,the lug III is released and the locking bar springs out to engage thepin I88! and this then holds the knob 82 against accidental displacementand the knob 82 will remain in this position until a different portionof the record is to be selected and used. The locking bar cannot beretracted sufficiently to clear the stop pins. It has a window throughit so that the position of the pointer in moving under the latch may beobserved.

The pneumatic circuits Corning now to the pneumatic circuits, themachine is illustrated as having three manually operable valves 8, 8 andII which are the rewind, stop, and start valves respectively. Thesevalves are of the type shown in Figure 5 of my Patent No. 2,180,793wherein. therein is a push button, and depressing the button merely letsan impulse of atmospheric air into a system which is normally undervacuum. Beginning first with the start button I8, there is a suctionline I20 which leads to one side of a pneumatic onand-oiI valve.Communication is established through this valve to the suction pump. Itmight be noted in connection with Figure 16 that all of the dotted lineslead directly. to the pump without any intervening valve so that theyare constantly under suction while the machine is operated, whereas thsolid lines represent tubes which are connected through interveningvalves to the suction lines.

The stop button 8 connects through a line IN to the other side of theon-and-off valve, the onand-off valve being designated generally as I22.In order that the invention may be more fully understood, briefreference should be made to the construction of the on-and-oii' valve,Figure 17 showing a section through a typical pneumatic on-and-oflvalve. The valve I22 ha a central chamber A. There is an opening throughthe upper wall of this chamber, and opening through the lower wall ofthis chamber and above the chamber A there is a pneumatic pouch chamberB, and below the chamber A there is a similar chamber C. A valve memberdesignated E is positioned in the chamber A, and by reason of gravity itnormally closes the port between the chamber A and the chamber C. Thevalve E has an upwardly extending valve stem e and a downwardlyextending valve stem e. The upper valve stem e is permanently attachedto a flexible diaphragm F in the pouch chamber B. In the chamber C thereis a similar diaphragm G which is positioned below the valve extensone". A pipe nipple H, which in the case of the valve I22 communicateswith the writing pneumatic 58 opens into the chamber A. Leading from thechamber C on that side of the chamber which is above the diaphragm G isa nipple I which communicates to the suction pump. Opening into thechamber B below the diaphragm F is a port J that communicates toatmosphere. The pipe I28 from the start button communicates through asuitable nipple to the chamber C under the diaphragm G and a similarnipple opening into the chamber B above the diaphragm F communicateswith the stop button. There is a by-pass K from the underside of thediaphragm C to the suction nipple I which by-pass has only a veryrestricted bleed orifice therein at k. Around the diaphragm 1" there isa similar bleed passage L in which is a bleed orifice I.

When the suction pump is not operating, the valve E closes thecommunication between the chamber A and the chamber C which in turncommunicates with the suction pump through the outlet I. When thesuction pump is started up, the valve remains in this position. Any airabove the diaphragm 1' cannot be exhausted through the bleed passage Lbecause of the valve E to the suction outlet I being closed at thistime. Suction tends to hold the valve E closed and tends to hold thediaphragm G down when the pump is started and while the pump isoperating. When an impulse of atmospheric air from the start buttonenters the tube I28, there is then atmospheric pressure under thediaphragm G and suction above it. This lifts the diaphragm G unseatingthe valve E and raising the diaphragm F. The valve E then seats againstthe port in the upper wall of the chamber A closing of! any atmosphericair that might enter the chamber A from the port J and the suctionnipple H leading from the writing pneumatic is then in directcommunication with the pump causing the writing pneumatic to collapse.As soon as the chamber A is put under vacuum by the lifting of the valveE, any air above the diaphragm F is exhausted through the bleed passageL, and atmospheric air entering the port J tends to hold the diaphragm1" up keeping the valve in this position. The parts remain in thisposition until something disturbs this condition of balance. Ii air isadmitted to the stop line I as for example by pressing the button 8atmospheric air enters the chamber 3 above the diaphragm 1" so thatthere is then atmospheric pressure on both sides of the diaphragm F andthe valve E drops down to its original position, this cuts oi! thesuction to the nipple I! so that the writing pneumatic can expand. Ableed opening is normally provided to permit the restoration 0!atmospheric pressure to the interior of the writing pneumatic when thiscondition occurs as will be readily understood by those skilled in theart. The writing pneumatic is thus controlled by an on and oi! valve.The tube I28 in Figure 16 Is the tube leading from the chamber A of theon and of! valve to the writing pneumatic. Through the use of an on andof! valve in this position the writing pneumatic will remain collapsedas long as the machine continues to operate and as long as no opposingimpulses of air are admitted to the 01! side of the valve. As soon asair is admitted to the of! side of the valve, the valve stays closeduntil there is apositive admission oi air to the on or start side oi thevalve. This has numerous practical advantages one of which is that iithe machine is stopped or shut down. as for example by the pulling outof the electric cord which connects the motor to the source of current,the restarting oi the motor will not cause the writing pneumatic tocontinue the forward operation of the machine so that suction can bebuilt up in the system before the record starts to move forward, andthen the record starts to move forwardly only when the start buttonismanually operated. The on-and-oif valve is also of convenience incorrecting records and in connection with the making of nil-ins wherepart of a letter Is to be manually written. The use of an on-and-oirvalve between the start and stop buttons and the writing pneumatic alsosimplifies the pneumatic circuit for automatic selection.

One or .the ports p controlled by the valve button 88 is connected by atube I28 to the start line I28. With this arrangement, when thevalve-operating finger I is in the intermediate position and is rockedby operation of the pneumatic I02, an impulse of air is admitted to thestart line in the same manner as if the button I0 were depressed. Asecond port p is connected through line I24 to a secondary valve I25 tothe suction pump, the secondary valve being a pneumatic relay which,when an impulse of air is admitted thereto, connects the line I26 withthe suction pump. The line I26 leads through a cut-off valve I 21 andtubes I 28 to the pneumatic brake pneumatics I29 and I30. When suctionis created in the line I28 collapsing pneumatic I29, a brake is appliedto the record spool holder and at the same time pneumatic I30 iscollapsed and applies a brake to the take-up spool. This brake mechanismwill hereinafter be described. The valve I 21 is a simple cut-off valvehaving a stationary movable disk shown in Figtires 6, 7 and 8. Thepurpose of the valve I2'I is to close off the suction between the brakeline I28 and the secondary valve I25 so that the brake pneumatics I28and I20 cannot be collapsed when the writing pneumatic 58 is collapsedas otherwise the brakes and the drive would be operating at the sametime, and in opposition to each other.

The valve I21 has a movable cut-ofi disk I2Ia with an operatingextension or pin I2'Ib thereon. As shown in Figure 3, the writinpneumatic 58 is. provided with an extension in the form of a strip metalfinger 58a that is turned down at its end and through which theextension I 2112 of the valve passes, the arrangement being such thatwhen the pneumatic 58 collapses, the valve disk I 2111 is rotated in onedirection and when the pneumatic opens, it moves in the other direction.As shown in Figure 8, the movable disk I2'Ia has a groove that cuts offand establishes communication with ports in the fixed member of thevalve. The fixed member I2Ic has two nipples leading therefrom one goingto each of the brake pneumatics whereas in the diagram this isillustrated as a single line I28 having two branches.

The port p in the neutral position of the selector valve communicateswith a tube I3I leading to the off side of an on-and-oif pneumatic I33which is similar in construction to the on-andofi. pneumatic I22. Theon-and-ofi pneumatic I33 controls a tube I34 leading to the rewindpneumatic 4I. When the on-and-off pneumatic I33 is in the on position,suction to the rewind pneumatic is established to collapse th'spneumatic. The fourth port p of the neutral position controlled by abutton 93 connects with a tube I35 leading to an on-and-ofi pneumaticI36 similar to I33 and which through tube I 31 controls the skip forwardpneumatic 43. By reason of the arrangement of the ports 71 and 12 whenthe button 93 is depressed to operate the writing pneumatic, the rewindand skip forward pneumatics are both turned to the off posit on throughtheir respective on-and-off valves I33 and I36.

The push button 32 of the selector valve controls two ports one ofwhichdesignated p in the diagram leads through tube I38 to the on sideof the on-and-off pneumatic I33 for collapsing the rewind pneumatic. Theother port p in ths position communicates to the tube I35 leading to theoff side of pneumatic I36 so that when the. rewind pneumatic 4| isoperated by operation of the button 92, the skip forward pneumatic issure to be turned to the oil position through an impulse of air admittedto the on-and-off pneumatic-I36.

The push button 84 of the selector valve controls two ports. Port 1)connects through tube I39 to the on side of the on-and-ofi pneumatic I38so that when button 94 is depressed, the onand-off valve I36 is turnedto the on position to energize the skip forward pneumatic 43. The pushbutton 94 also controls port 1) which connects to the tube I3I leadingto the off side of the on-and-off valve I33 so that when valve I36 is inthe on position, I33 is certain to be in the oil position.

The tracker bar I8 has an opening I8a that connects to a tube I40designated a rewind tube that leads to a secondary valve I4I. Aspreviously explained, a secondary valve is a pneumatic relay throughwhich the small impulse of air entering the tracker bar opening I8a isutilized to connect the relatively large valve-actuating pneumatic I02with the suction pump, the valveoperating pneumatic I02 communicating tothe secondary valve I4I through a tube I42. Tube I40 has a branch I43leading to the manually operated rewind button 8. The opening I8a isintended to be controlled by a perforation in the record roll passingover the tracker bar. The tracker bar has another opening at I8b thatcommunicates with a tube I44, designated repeat which connects with thetube I40. The tracker bar has a third opening I8c that connects througha tube I45 that connects into the line I2I leading from the stop buttonso that the movement of the record over the tracker bar may serve tostop the drive in the same way that the manual operation of the stopbutton 9 will stop the drive.

The drive release valve 64 has two tubes leading therefrom. The firsttube I46 leads to a primary valve I41 which renders the typewritterkey-actuating selector inoperative when either the rewind pneumatic orthe skip forward pneumatic is energized so that the typewriter keys willnot operate when the record moves at high speed in a forward or areverse direction over the tracker bar. The other tube I48 connects intothe stop line I2I so that the writing pneumatic 58 will go to the allposition when either the rewind or the skip forward pneumatic isenergized.

The brake pneumatic I23 serves to contract a brake band which operatesabout a hub ISA (see Figure 2) on the outside of the plate I6 which isat the end of the stud shaft which carries the rewind and record-holdingflange I8 (see Figure 3). The brake pneumatic I30 operates a similarbrake band on the drum 28 (see Figure 3) at the lefthand end of thetake-up spool shaft 21. The rewind brake is designated generally as I49,and the other brake mechanism on the take-up spool is indicatedgenerally at I50.

Assuming that a record roll has been placed in the machine and that allof the indexing pins have been properly set and the first letter whichthe operator wants to write is the third letter on the record roll, theknob 82 is turned in the manner hereinbefore described to bring the lockor latch IIO opposite the proper indexing pin. This turning of the knobadvances the disk to the front of the pin 14 on the gear wheel I3causing the valve finger I00 to be in the position shown in Figure 14where it is in position to operate the valve button 34. The operatorthen presses the start button whereupon the writing pneumatic 56 isenergized to start the record winding forward I slowly. As the recordmoves forward slowly a hole in the record uncovers the port IBb in thetracker bar letting an impulse of air into the line I labeled repeat.This instantly causes the operation of the pneumatic I02 to operate thevalve finger I and depress the valve 94. This in turn energizes theon-and-oif valve I36 so that the skip forward pneumatic is actuatedcausing the high forward speed drive disk 35 to engage the flange 25 ofthe take-up spool and the record is driven forwardly at a high speed. Atthe same time the drive release valve 64 is operated to release thewriting pneumatic 50 and render the key action of the typewriterinoperative. As the record drives forwardly at high speed the sear wheelI3 is turned in a clockwise direction. At the proper time it engages inthe notch 00a of the disk 80, starts to rotate this disk causing theshaft 84 to move down. This in'turn rocks the valveoperating finger I00to the neutral position and if the index pins have been properly set, atthe time the finger I00 is in the neutral or intermediate position, asecond opening in the record, either in the rewind or repeat position onthe record uncovers one of the openings Ila or Ilb admitting an impulseof air to line I 40 to again actuate the pneumatic I02 which rocks thevalveoperating finger I00. At this time the valve finger is in theneutral position and the intermediate button 93 is depressed. Depressingthis button causes an impulse of air to be admitted through port 12immediately applying the brakes to check the forward high-speed travelof the record roll. Next it admits air to the start line I20 energizingthe writing pneumatic 58. At the same time it operates the on-and-ofivalve I36 to the off position to restore the skip forward pneumatic to aneutral position and releases the high-speed drive, When the skipforward pneumatic returns to its neutral position, the drive releasevalve 64 is closed and as the record then moves forward at writingspeed, the key action is made effective. As the record continues todrive forward at slow speed, the pin 14 on the worm wheel 13 rotates thedisk 80 to an over-center position throwing the valve-operating fingerI00 up to the position shown in Figure where it is over the rewindbutton 92. When the end of the part of the record which is to be used isreached, an opening in the record again uncovers either the port I80 orIBb causin an impulse of air to enter the line M0 to again operate thepneumatic I02 and causing the valve finger I00 to press the button 92in. This causes the rewind pneumatic to be energized so that the recordwill start to rewind at high speed. It causes the drive release valve tobe opened rendering the key action inoperative. It admits air to thestop line of the writing pneumatic 58 rendering this pneumaticinoperative which in turn causes the brake valve I21 to be set to anopen position. As the record rewinds, the worm wheel I3 is driven in acounterclockwise direction and the pin I4 engages the disk 80 to rotateit. When the valve finger I00 is again in the neutral position, anopening in the record roll will uncover the port I8b of the tracker bar,operate the pneumatic I02 and cause the valve-operating finger I00 to bepressed in to again engage the button 93 and the record will then startwinding forwardly again at the normal writing speed. The selectedportion of the record will thus continue to write forward at slow speedand rewind until the knob 82 is changed to a different position. Theknob 82 can be changed to a different position during the writing of aletter and it will not affect the operation of the record; it willmerely change the position of the valve-operating finger I 00 and therecord drive will not be aflected until one of the ports Ila or Ilb onthe tracker bar has been uncovered. Then the record will rewind orcontinue to travel ahead according to whether the disk is in advance ofor behind the pin 14. It should be explained that when the record isrepeated and then started forward to write agin, an opening is usuallyprovided in the tracker bar to register with the opening I0c so as toautomatically stop the machine Just before the portion of the record tobe used moves over the tracker bar, giving the operator of thetypewriter time to remove the letter previously written and insert a newsheet of paper and make such manual fill-ins as she may have to make.After the machine is stopped in this way it is of course started bymanually pushing the start button.

The selector mechanism providing as it does a relatively movable drivenmember and a manually adjustable member with the disk 00, together withthe contacts whereby relative movement between the gear and theadjustable disk 80 is converted at the proper time to a reciprocatingmotion, is a unique mechanical movement in itself, and the use of such amovement as a selector mechanism is novel and provides a positive andeasily operable selector. The arrangement whereby the valve finger I00is shifted mechanically by relative movement between the gear 13 and thedisk 80 and whereby the finger is depressed pneumatically under thecontrol of the record itself is also a novel arrangement. It is verymuch more simple than mechanisms heretofore provided for this purpose.Moreover, the selector unit as a whole is one wherein the selection ofthe next portion of the record to be used may be made during theoperation of the machine and while it is using a different portion ofthe record. The indexing is very easily accomplished through the use ofthe removable pins I 09 in conjunction with the pointer which moves overthe indexing disk as the record moves.

The drives for the record spools are of simple and unique construction.The pneumatic clrcuit, particularly in the employment of an onand-oifvalve for the drive pneumatic and in the employment of separateon-and-off valves for the skip forward and rewind pneumatics,constitutes a unique and desirable arrangement and one which lendsitself to use with the particular type of selector employed. Thepneumatic circuit is further unique in the provision of the relief valveoperated by movement of either the skip forward or rewind pneumatic andconstitutes a simple way of rendering the forward drive pneumaticinoperable when either of the first two above-mentioned pneumatics areoperated. The provision of the brakes on the rewind and take-up spoolsenables the spools to be free-running at all times except when themotion of the record is to be stopped, and the provision of the cut-offvalve operated by the drive forward pneumatic renders the application ofthese brakes inoperative when the record is being driven forwardlyslowly.

Numerous other features of novelty and other advantages will be apparentto those skilled in the art. It will be understood that while I havespecifically described one preferred embodiment of my invention, theinvention is not restricted to this particular construction andarrangement of the parts and various changes and modifications may bemade in the parts within the contemplation of my invention and under thescope of the following claims.

I claim:

1. A pneumatic record mechanism of the class described comprising aflanged record spool holder and a flanged take-up spool, a frictionwheel disposed between the peripheries of the two flanges, means fordriving the friction wheel, means for reciprocating the friction wheelinto contact with either one or the other of said flanges for drivingone or the other of them, said means comprisng opposed pneumaticsconnected together, a second forward drive for the take-up spool,pneumatically operated means for rendering said second forward driveoperative, pneumatic circuits whereby said opposed pneumatics are in aneutral position when the second forward drive is operative, and arelief valve operated by the movement of either of said opposedpneumatics for rendering the forward drive inoperative when saidfriction wheel is engaging the periphery of one or the other of saidflanges.

2. A pneumatic mechanism having opposed record spools, means for drivingthe record spools in a forward direction or in a rewind direction atrelatively high speed, a slow speed forward drive for one of the spools,a pneumatic for rendering said slow speed forward drive operative,pneumatically operated brakes for the record spools, and valve means incircuit with said pneumatic for rendering the brakes inoperative whenthe slow speed forward drive is operating.

3. A pneumatic mechanism of the class described having a tracker barover which a record is to be moved, a flanged record spool holding meansat one side of the tracker bar, a flanged take-up spool means at theother side of the tracker bar, a friction wheel between the said twoflanged means movable from a neutral position where it frictlonallyengages the flange of one or the other of said means, means forcontinuously driving said friction wheel, means for shifting thefriction wheel from the neutral position into position to engage theperiphery of the flange of one or the other of said means, saidlast-named means comprising opposed connected pneumatics and pneumaticcircuits including an on-and-off valve for each pneumatic for operatingsaid pneumatics, valve means for controlling the on-and-off valves insuch manner that when one is in the on position, the other is in the offposition, a second driving means for the take-up spool means, apneumatic for rendering said second drive means operative, an on-and-offvalve for controlling said last-named pneumatic, and a drive releasevalve operated by the opposed pneumatics for rendering said last-namedpneumatic inoperative when either of said two onand-off valves is in theon position.

4. A pneumatic mechanism of the class described having a record spoolunit with a skip forward and rewind drive mechanism and having a normalforward drive mechanism, a pneumatic circuit for controlling saidmechanisms, said circuit including a selector valve having three pushbuttons, one being a skip forward button, one a rewind button and one aforward drive button, a mechanical finger for selectively operating anyone of said buttons. a combined manually adjustable and record spooldriven means for moving said flnger into position to engage a selectedone of said buttons, and pneumatic means for operating the flnger todepress the selected button.

5. A selector mechanism for pneumatic actions comprising avalve-operating finger selectively movable in a plane to difl'erentoperating stations, a push button valve at each station, and means formoving said flnger in a direction normal to the first named plane ofmovement for depressing said push button valves, said lastnamed meanscomprising a single pneumatic effective at any position to which theflnger is moved in said first plane.

6. A selector mechanism for pneumatic actions comprising a record andrecord spool mechanism, a valve-operating finger selectively movable ina plane to different operating stations, a push button valve at eachstation, means for moving said finger in a direction normal to the planeof the first movement for depressing said push button valves, saidlast-named means comprising a pneumatic, and a combined manuallyadjustable and record-spool driven mechanism for moving the finger tothe different stations.

7. A mechanism of the class described comprising a carrier havingtransverse shaft and an axially extending shaft mounted thereon, saidshafts each having an offset arm thereon, the arms of the two shaftsbeing in parallel planes and being pivotally connected to each otherwhereby rotary movement of the former shaft imparts a reciprocatingmovement to the latter, a relatively movable driven member adjacent thecarrier, and cooperating means on said driven member and on saidtransverse shaft for imposing a limited rotational movement to thetransverse shaft upon relative predetermined movement of the drivenmember past the center of said transverse shaft.

8. A mechanism of the class described comprising a carrier having atransverse shaft and an axially extending shaft mounted thereon, anadjusting knob for rotating the carrier, said transverse and axiallyextending shafts being pivotally connected to each other through offsetarms extending radially from each shaft whereby rotary movement of theformer imparts reciprocating movement to the latter, a relativelymovable driven member concentric with said axial shaft adjacent thecarrier, and cooperating means on the driven member and on saidtransverse shaft for imparting a limited rotational movement to thetransverse shaft upon movement of a given point on the driven memberpast the center of the transverse shaft.

9. A mechanism of the class described comprising a carrier having atransverse shaft and an axially extending shaft mounted thereon, anadjusting knob for rotating the carrier, said transverse and axiallyextending shafts being pivotally connected to each other through offsetarms extending radially from each shaft whereby rotary movement of theformer imparts reciproeating movement to the latter, a relativelymovable driven member concentric with said axial shaft adjacent thecarrier, cooperating means on the driven member and on said transverseshaft for imparting a limited rotational movement to the transverseshaft upon movement of a given point on the driven member past thecenter of the transverse shaft, an indexing disk adjacent said knob, anda pointer operated by the driven member movable about the indexing disk.

10. A mechanism of the class described comprising a carrier having atransverse shaft and an axially extending shaft mounted thereon, anadjusting knob for rotating the carrier, said transverse and axiallyextending shafts being pivotally connected to each other through offsetarms extending radially from each shaft whereby rotary movement of theformer imparts reciprocating movement to the latter, a relativelymovable driven member concentric with said axial shaft adjacent thecarrier, cooperating means on the driven member and on said transverseshaft for imparting a limited rotational movement to the transverseshaft upon movement of a given point on the driven member past thecenter of the transverse shaft, an indexing disk adjacent said knob, apointer operated by the driven member movable about the indexing disk,and cooperating means on the indexing disk and the knob for releasablyholding the knob in the position to which it is adjusted.

11. A mechanism of the class described comprising a carrier having atransverse shaft and an axially extending shaft mounted thereon, anadjusting knob for rotating the carrier, said transverse and axiallextending shafts being pivotally connected to each other through offsetarms extending radially from each shaft whereby rotary movement of theformer imparts reciprocating movement to the latter, a relativelymovable driven member concentric with said axial shaft adjacent thecarrier, cooperating means on the driven member and on said transverseshaft for imparting a limited rotational movement to the transverseshaft upon movement of a given point on the driven member past thecenter of the transverse shaft, an indexing disk adjacent said knob, anda pointer operated by the driven member movable about the indexing disk,said means including shiftable indexing pins on the indexing disk and areciprocable latch member on the knob.

12. A mechanism of the class described comprising a carrier having atransverse and an axial shaft carried thereby, each of said shaftshaving a radially extending arm thereon, the terminal 4 in said memberwhereby relative movement of the notched member past said means causesthe transverse shaft to be rotated.

13. A mechanism of the class described comprising a carrier having atransverse and an axial shaft carried thereby, each of said shaftshaving a radially extending arm thereon, the terminal portions of thetwo arms being pivoted together whereby a rotational movement of thetransverse shaft will impart a reciprocating movement to the axialshaft, a notched memher on the transverse shaft, a wheel-like memberconcentric with the axial shaft adjacent the carrier having meansthereon to engage the notch in said member whereby relative movement ofthe notched member past said means causes the transverse shaft to berotated, a valve-operating finger movable in a plane by the axial shaftto any one of several diflerent operating positions. push button valvesat each position to which the finger is movable, a pneumatic cooperatingwith the finger for moving it in a direction normal to the said firstplane of movement for depressing a selected push button, a record spoolmechanism and drive controlled by the push button valves, means fordriving the wheel-like member from the record spool mechanism, andrecord-controlled means for operating said pneumatic.

14. A pneumatic mechanism of the class described having a tracker barand record spool driving means for moving a record over the tracker barin forward and reverse directions at high speed, and other means formoving the record over the tracker bar at slow speed. a selector valvefor determining the direction of movement of the record, said selectorhaving three diflerent valve elements, an operating finger movable toengage any one of said valve elements, a cornblned manualhr-adjustahleand record-spool driven means for shifting said finger to determinewhich of said elements shall be operated, and record-controlled meansfor operating the finger after the finger has been shifted to a selectedposition.

GEORGE W. GARIBON.

